First detection of the [CII] 158 µm line in the intermediate-velocity cloud Draco

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Volume 686 (June 2024)

A&A, 686 (2024) A109

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Table 2

Physical parameters of Draco for the five observed positions.

Position	[C II]	[C II]	[C II]	[C II]	N(H)	T_d	FUV	FUV
	T_mb	υ	FWHM	I			160 µm	stars
	[K]	[km s⁻¹]	[km s⁻¹]	[K km s⁻¹]	[10²⁰ cm⁻²]	[K]	[G_o]	[G_o]
Front 1	0.16	−25.6	1.32	0.22	8.48	13.4	3.7	${1.55}_{1.51}^{1.59}$ ${1.55_{1.51}^{1.59}}$
Front 2	0.09	−22.4	4.03	0.37	5.80	13.8	3.1	${1.56}_{1.52}^{1.60}$ ${1.56_{1.52}^{1.60}}$
Nose 1	0.11	−23.9	3.26	0.38	12.70	13.1	4.3	${1.57}_{1.52}^{1.61}$ ${1.57_{1.52}^{1.61}}$
Nose 2	0.16	−24.9	2.02	0.36	13.17	12.9	3.2	${1.57}_{1.53}^{1.61}$ ${1.57_{1.53}^{1.61}}$
IVC	–	–	–	–	3.21	13.3	2.2	${1.58}_{1.54}^{1.61}$ ${1.58_{1.54}^{1.61}}$

Notes. The name of the position is given in the first column, followed by the [C II] main beam brightness temperature, line velocity, FWHM, and line integrated intensity. These values were determined from a single Gaussian line fit. Columns 6 and 7 give the hydrogen column density and temperature from Herschel. Column 8 displays the FUV field in Habing units, determined from the 160 µm flux, and Col. 9 the one from the census of the stars (Sect. 5.1). The FUV values are given for the heliocentric distance D of the source. The upper and lower values indicate the field considering the uncertainty in the distances (D+∆D and D−∆D).

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